
  /*
    user:用户的id
  */
  req.session.m_id='123';
  var obj={
    user:req.session.m_id
  }
  var md5Str=toSingy(obj)
  if (md5Str == req.headers.singy) {}
  else{
    var respond = {
        ret: 201,
        data: {}
    }
    res.json(respond);
  }